Results (
Thai) 1:
[Copy]Copied!
The occurrence of blooms has been defined in Lake Erie usingvarious types of metrics (Fig. 1 and Electronic Supplementary Material. An in-depth review of the methodologiesassociated with these metrics and their advantages/disadvantages isavailable in Srivastava et al., and a timeline of studies makinguse of these metrics for Lake Erie is provided in ESM Table S1. Biomassand/or biovolume abundance has been reported in terms of totalphytoplankton, total cyanobacteria, and/or individual species abundance, and chlorophyll a (chl a) concentration has also beenused as a proxy for total abundance . Microcystis-specificDNA analyses have been reported to confirm presence , and cell counts combined with the other metricslisted here have been used to quantify the relative abundance ofMicrocystiswithin the total cyanobacterial or phytoplankton population. Presence and concentrations of microcystin, a toxin secreted by some cyanobacteriaincluding Microcystis, have been reported as a measure of the toxicityassociated with blooms although the concentration of microcystin is not necessarilyproportional to the amount of Microcystis. Remote sensing has alsobeen invoked to identify blooms, based on different biotic and abioticmetrics that use algorithms to relate satellite reflectance data with insitu observations. More qualitative depictions ofblooms use reports of surface scums appearing in the peer-reviewedliterature, in news outlets, (e.g. “a thick slick of green paint” , in governmental reports (“surprising Microcystis blooms of
1998”, and in anecdotal reports (“reports
of Microcystis by anglers” ). The presence of surface
scum is dependent on in situ hydrodynamic conditions, however, and
is therefore not a definitive identifier of HABs.
Being translated, please wait..
